Swivel-jaw spindle and chuck.



t. J. MCCLELLAN,

SWIVEL JAW SPlNDLE AND CHUCK..

APPLIQATION FILED JULY 30,1914.

5.1. MCCLELLAN. SWIVEL JAW SPINDLE AND CHUCK.

APPLICATION FILED JULY 30,1914- 51,25 1,986. Patented Jan. 1, 1918.

3 SHEETS-SHEET 2.

E. J. MCCLELLAN. SWIVEL JAW SPINDLE AND CHUCK.

APPLlcMvloN FILED JULY 30.1914.

. EQQLQS., Patented Jan. l, 1918.

3 SHEETS-SHEET 3.

llhlllllll@ STAT@ ATNT @FFQE EDWARD J. MCCLELLAN, OF NEW YORK, N. Y.,ASSIG-NOR TO THE GARVIN MACHINE COMPANY, A CORPORATION OF NEW YORK.

SWIVEL-JI'LW SPINDLE AND CHUCK.

Specification of Letters Patent.

Application filed July 30, 1914. Serial No. 854,042.

T o all 'whom t may concern:

Be it known that l, EDWARD J. MCCLEL- LAN, a citizen of the UnitedStates, anda resident of New York, in the county of New York and Stateof New York, have invented a certain new. and useful Swivel-Jaw Spindleand Chuck, of which the fololwing is a specilication.-

This invention relates to monitor-lathes, screw machines, automaticlathes and similar machines in which articles are manufactured byrepeated cutting operations with tools.

`An ordinary simple lathe is limited, in a single operation to turningobjects which are round with respect to a single central axis. Similarlythe ordinary screw machine and 'turret or monitor-lathe have definitelimita-tions. For example, an object like a cube or prism could not beworked upon in an ordinary monitor-lathe or screw machine on more thanone of its faces in one operation. TWork uponthe other faces would haveto be done in succession by taking the article out oi the lathe andrechucking it.

This ordinarily requires putting the articles in a series through oneoperation, then commencing again and going through the series withanother operation, etc., consuming` timein proportion to the number ofoperations. 'Thus an article like a gas cock,

having boring, reaming, facing and tapping operations from three or moresides would necessitate at least three operations with an ordinary screwmachine or monitor-lathe. lt is therefore desirable to increase thefield and widen the limitations of these machines, and the presentinventionv is directed to such an improvement.

It is, of course, not suihcient to merely provide for the motions in anabstract and theoretical way, because the cutting and working of metalaty high speeds calls for great applications of force and the rigidityand strength and power of the mechanism must be adapted to resist suchheavy applications of force without either yielding or vibration. Theslightest t.yielding or vibration under any one of the great variety offorces imposed makes tlie work lose accuracy and finish, damages thetools, and greatly interferes with theoilioiency'of their action.Accordingly, the provision of adequate strength and rigidity towithstand everyrcondition of practice is a matter of prime importanceand constitutes an important part of the invention.r 'Unless everyfeature can be carried out Without any sacrilice of solidity and perfectrigidity, the machine tool will not be operative from a practicalstandpoint. lt is particularly the Patenten aan. i, isis.

purpose of the present invention to provide adequate solidity, strengthand rigidity under all conditions, while carrying out the improvedpurposes first mentioned. YVith these objects in view the inventionconsists in the features of construction and combination as hereinafterset forth.

In the drawingsf'- Figure l is a longitudinal sectional view showingpart of aspindle and chuck construction embodying the principles of thisinvention.

Fig. 2 is a sectional view on the line ll-H of Fig. l looking in thedirection of the arrows.

Fig. 3 is a section on the line IH-lll of iFig. l looking in thedirection of the arrows.

Fig. e is a section on the line lV-IV of Fig. l looking in the directionof the arrows.

Fig. 5 shows the complete spindle and its ,operating parts, partly insection.

Fig. 6 is an end view, certain of the parts being broken away forclearness.

Fig. T is a side elevation partly in section of a chuck corresponding inall its main features to the embodiment `of the invention shown in Figs.4l to el. inclusive, but having an improved construction pf guidingways.

Fig. 8 is a front elevation of the same; and

Fig. 9 is a top View, with respect to Fig. 7, partly in section.

Constructions embodying the invention will include a chuck having jaws lbetween which the work may 'be grasped. These'iaws `will have a movementto clamp 'upon-the Work, and in addition will have other movementsadapted "to rotate or otherwise move the work during a single clamping'engagement, from one position to another, to the end that the tools mayact on different faces of the work, all however as part of the sameoperation. 2 designates a lathe spindle, and as a convenient chuckoperating means there is best provided a tithe 3, hereinafter rework.

In the constructions illustrated in the drawings, a draw-block it is'slidable axially of the chuck and is provided with two Hat faces 5,each of which' hasV av series of, in-V4 clined grooves or ways (inthegrooves or ways on one face beiug'inclind. oppositely to those on theother face.v Engaging each flat face of this drawblock lare correspondingly flattened faces on extensions 7 of the jaws 1, -these facesfurther having ribs 8 which enter the grooves or ways 6 referred to. lnorder to provide for the engagement just mentioned and at the same timeto per mit the jaws to be located opposite one another on a common axis,the extensions 7 are carried inward from the sides of the respectivejaws to be forced apart or forced toward one another'by an endwisemovement of the draw tube anddraw-block. lit is, however, important tosecure this movement without sacrice of rigidity and this isaccomplished in the preferred construction illustrated in Figs. 7, 8 and9 in the ollow ing wav.

The best practical construction embodying the invention will haveguiding ways for the jaws which constitute an important `ifea.-

"ture of the invention, s/,o`that the'ujaws may have an easy movementtheir guides, without being cramped or bound therein, when being clampedupon a. piece of work. t-This is particularly valuable when the jawspro* ject considerably Vfrom the tace of the chuck, in other words,having what may be described as' a considerable overhang on the work,which results in a special tendency to cramp the jaws in theinguidesunless means are adapted-to prevent this. Moreover, the guides for thejaws are adapted to secure great strength and rigidity not only in adirection parallel to the'movement of4 the jaws, but also transverselyand in separate directions 'both 'inward land lateral. The feature justmentioned, relating to securing rigidity in two directions across thepath of movement of' the jaws, results in securing rigidity across theface of the chuck, besides in a direction inward or parallel to the axisof rotation thereof. The elimination of any lateral yielding or rockingof the jaws on the face of the chuckis independent of the .features bywhich inward or longitudinal rigidity is imparted. These variousfeatures, relating to the guidingof the jaws of the chuck are in manycases independent of the other features by which the jaw heads have aswiveling movement.. 'For this reason, and in the interest of greaterclearness, the swivel head features have been largely omitted from thedrawings of Figs. 7 8 and Lacasse 9, wherein the best practicalconstruction of guiding the chuck ljaws is illustrated in detail.

rIhe extensions or bases 7 of the jaws as just described, having theflat facesand ribs 8 which engage the respective iat faces 5 and grooves6 of the drawback ,4, areifn accordance with Figs. 7, 8 and 9, prolongedor carried in partentirely across the body .of the chuck, as at1,0.Vnearly to theextent of the full diametiithereo.- Under' thesecondit-ions these jaw bases or extensions 7, prolonged at 10, lap pastorclear one anothen,

@Referring to Fig. 9 the top or visible jaw -is shown with itsAextension or base, here del noted .7L extending downward, and..prolonged *in fact practically across the entire diametei-of the chuck.rlhe under or practically invisible jaw in Fig. 9 has its extension orbase similarly prolonged clear across the whole diameter of the chuck,and appearing at 10b. lt will be observed from Fig. 9 that each` jawextension or base eX- empliied by `7/of the upper jaw, has three guides,afforded by the tongues or ways 11', 112 and 113. This extension or baseis however not guided by all three tongues or ways N 11', llz'an'd 113throughout the prolongation thereof. The prolongation 10 of theextension or base has only the guiding tongues or.

ways 11', 112. This. is due to the fact that yeach jaw extension of basewill, in the best constructions, have a lateral part 7X whichprojectsadjacent to the rolongation (see 10'j of Fig. 9) of the otherjaw. This part 7 will be guided on the tongue or way 113, which tongueor rib, at a dii'erent portion of its length affords the third guide forthe extension or base of the other jaw the under jaw in Fig. 9) just asthe upper jaw in this figure is actually shown to be guided. The

lateral separation of the respective jawA prolongations is sutiicient toreceive the drawblock l having the ribs thereon as already describedengaging 4corresponding ribs -to operate the jaws.

lt will be observed that in accordance with the above, euch jaw has whathas been termed an extension, denoted 7, being really the rear part or.base of the jaw itself, which is comparatively broad,in fact as broad asthe jaw itself, and such extension runs in guides of the casing on bothsides, thereof, these guides being common to both jaws. 1n

Lacasse other' words, the extension or oase 7 of each jaw is guided onboth sides by ways which are also a common guiding means for theextension or base of the other jaw, acting in a precisely similar wayfor both jaws. lhis guiding means secures 'great lateral rigidity andbraces the jaws against any lateral yielding. But in addition to suchextension or base 7, each jaw has a prolongation of the extension orbase which extends clear across the whole diameter of the chuck, orsubstanl tially so, and these prolongations have individual guides inthe chuck casing which are not common to the other jaw. Theseprolongations, which make the jaw guided clear across the whole diameterof the chuck, give the jaws great longitudinal stillness, and brace themagainst any longitudinal yielding. ln this way the jaws are given a freemovement and are permitted to clamp the work without binding on theirways. By both features in combination the jaws are given he combinedfeatures ol longitudinal, inward., and lateral stillness, as lirstpointed out above.- Each. jaw will have a swivel head, if desired, andmeans for operating' the saine in constructions containing the 'fullpractical embodiments o' the whole invention.

Before referring to these latter features, however, mention may be madeoil an alternative type ot' guide for the jaws, illustrated in l to ainclusive, to which type for convenient illustration, the swivel headfeatures have been exclusively illustrated in their details. lt'will ofcourse be understood that these swively head features are equallyapplicable to either form of chuck, t'. e. that of 7, 8 and 9 or Figs. 1to 4 inclusive, and Figs. 5 and 6 are generally illustrative of eithertype of chuck, with such. swivel. head features, and operating meanstherefor, applied.

ln tto 4. inclusive each jaw has a guide rod 1G firmly secured thereto,which guide rod is preferably carried directly through the heavier part7 of the jaw eX- tensioiis just described, project-ing out a certaindistance at each end. These guide rods are therefore part of the chuckjaws and are carried outward through suitable guiding holes l1 :formedin the vframe or casing 12 of thechuck. The location of the guidingholes or bushings in this way separated by the greatest possibledistance, and made part of the solid chuck casing 1'2, obtains thegreatest possible rigidity, and freedom froml looseness resulting fromany slight wear. Moreover, the force put on the bearings by the slidingmovement of the jaws is greatly lessened by this considerable separationof these guiding bushings. In addition to being guided in this way, eachjaw has in additional sliding engagement 13 on the.

guide rod 3.0 of the other and corresponding to the lateral extension orbase 7X of Figs. 7 8 and 9. This sturdily resists any tendency of therespective jaws to swivel upon their guide rods. lu other words, the jawis braced laterally just as is done in another way by the form of Figs.7, 8 and 9.

The jaws project out for a considerable distance from the face of thechuck, as already mentioned, to the end that a sulficient depth of spacemay be provided between them to engage a variety of work. l hiscondition would set up binding strains and would also cause wear, exceptfor-.the comparatively long guide rods 10, or equivalent prolongationsl0 in Figs. 7, 8 and 9, which control the movement of the jaws. 'lhiscross projection of the jaws is therefore a further vfactor related tothe meansfor securing stillness in the guiding of the jaws. lt will,however, be understood that the guiding means for the jaws are to alarge extent independent of other features of the invention hereinafterdescribed, and as to these other features, other jaw guiding means maybe substituted, such for example, as set t'orth in our prior lateut No.927,424. Each jaw carries a swivel head, the two heads swiveling on acommon axis, preferably dianietrically of the chuck, and means will beprovided for swivcling one or both of the heads, and in accordance withthe present invention this swiveling is accomplished without arrestingthe rotation of the chuck with the attendant loss of time and powerwhich would result ltrom stopping the rotation to lswivel the jaws.Furthermore, the jaws are adapted to swivel without'releasing theirclamping pressure on the work, `which is very important in that any vrelease of the pressure might permit a slight shifting in the positionof the worlr after the tools had worked on one part and before the toolsengaged another part. This' shifting would be fatal to accuracy. As ameans of permitting the heads 20, 21 to swivel while under the clampingpressure, each head has a cylindrical body fitting a correspondinglycylindrical 'recess in the jaws 1 and a cap or flange 22 fitting asomewhat enlarged annular cavity 23 formed by a suitably recessed screwcover Q3 ofthe jaw. This screw cover has a centrallyhardened plate 24,and a similar hardened plate may be embedded in each rotatable headin asuitable central or axial deposition there-I of. This leaves a cavity 25with hardened Araces in which balls 26 are placed to tolte the holdingof the work and swiveling the same into derent positions, but dohotprotation of the chuck.

' the end ot' the draw tube and being cut with teeth to form a gear 31at the point where it projects from the draw tube. The train of gears,32, 33, 34, each on rigid axles extendinginto suitable bushings in thecxtensions 'i' of one ot' the jaws .1, mesh with the Iirst mentionedgear 3l and terminate in a yworm 35 within the jaw, which worm projectssomwhat into the cylindrical rc cess thereof soo as to mesh with a wormgear 36"* preferably integrally cut upon the swivel head 20 of this jaw.The result ofturning the rod 29 within the' draw tube is to transmitrotation through the chain of gears just described and rotate the swivelhead 20. But, inasmuch as the chuck as a whole is in continuous andnormal rotation, the same effect is obtained by holding the rod 20stationary, in which case they gears planetate around the temporarilymotionless central `'gear 31 and transmit a rotative movement to theswivel head ot' the'chuck, as long as the latter rotates while the rodis being held stationary. T his rod Q9 can be held stationary in anysuitable way by' a brake, or by a simple handle at its exposed end,which may be grasped and held stationary as long as desired.V Withoutthe application of such holding means however, the rod naturally rotateswith the rest of the chuck andthe swiveling movement of the head doesnot take place.. lt is sutiicient to transmit movement to one head sincethe work is held firmly between the two heads, causing them to rotate inunison.

The important feature of the operation just described is of course thepresence of a gear which has its teeth concentric to the axis ofrotation of the chuck, to the end that such gear may rotate in unisonwith the chuck, or else be 'held stationary while a gear on the chuckmeshes or runs on the teeth of the new stationary gear. This being trueit is of course not necessary that said gear concentric with the axis ofthe chuck be always a small gear or pinion inside the chuck. It may beof any size. lt is obvious that such an external gear will serve the'same purposes and results, or substantially lthe same, purposes, as thepinion 31. ln every case there is a gear concentric with the aXis ot'the chuck, the further details as just referred to being relatively ofminor importance.

lhe proper swivel positioning of the A rod 29 is illustrated extendingtestcase heads is not necessarily etfected in the absence of Somespecial positioning means, and the locking ot the work in definitepositions is correspoiulingly a matter ot importance. yIn order tosecure this result, one of the swivel heads, preferably that havin" theworm drive as just described, may aso be provided with a plurality ofrecesses 37 located at regular or irregular angular intervals adapted tothe work. For example, recesses at 90 degree intervals would be Suit:able for work requiring machining on four t'aees, like the tour sidefaces ot' a cube.' But work requiring machining on axes 45 degreesapart, or any other regular or irregular arrangement, may be providedfor by replacing one recessed cap Q2 by another, which can be readilydone by unscrewing the cover plate 123 at the. end ot' the jaw. Therecessed cap Q2 is shown secured in place by screws 38 so as to beremovable, permitting the iu'ljustment mentioned. lVhile the rccesses 37may be Jformed in many different ways, and various t'orms ot' lockingmcansfy used. a convenient arrangement consists in a lo'ek pin Je()guided in a hole parallel to the axis ot' the swivel heads and workingagainst the under liat face of the recessed cap 22. The recesses mayhave a deep square shoulder 3T onone side and a shelf SlT" terminatingin an incline 37 on the other side. The, lock pin -lO is shown witharectangular end adapted to fit. the recesses ST closely, and is heldagainst swiveling on its own axis by a transverse pin t1 projecting intoa slot 42 of the jaw l. The lock pin has a reduced cylindrical extensiont3 surrounded by a coil spring H bearing against, a fixed plug oranchorage 4o and rod tion to enter the recesses 37. In this conistruction 47 designates a bell crank lever lpivoted in a cavity 48 otthe jaw 1 adjacent to the extension 7 thereot and ada ted to bev rockedby a second rock lever 49 w ose path of movement extends radially inwardof the chuck into the path of movement of an ex-v tension 50 of thearbor 30 already described, which in turn forms part of the main op-rerating rod 29 within the spindle. ByA projecting tion, the rock lever49 operates the bell crank lever 37 and pulls the lock pin -t0out ofenga ement with its locking recess 37. if theretore the rod is heldagainst turning, the heads will swivel as already described. Thisswiveling will continue until the locking pin again drops into a lockingrecess, and the certainty of this latter result is greatly increased bythe depressed shelf 37 llis ofthe locking recess as already described.l

Accordingly` the swivel heads are given repeated angular movementsthrough a definite range and are thereupon locked firmly in fixed.positions, all Without releasing their the rod therefore, 1n thisconstrue4 assises clamping engagement on the work, and without stoppingthe rotation of the chuck. The usual tools of the screw machine ormonitor-lathe may be brought to bear on the respective faces in theprescribed order.

The foregoing constructions provide for all the main operations ashereinafter referred to, except in so far as the movements of thecontrolling rod are secured. As already stated this may be obtained bythe operator himself, who can lirstpress therod inward and then grasp itagainst rotation until the swiveling heads come into a locking position,whereupon the rod will commence to rotate with the chuck, slipping inthe operators hand. It is, of course, understood that the operator inthe meantime has allowed the rod to move longitudinally enough to permitthe lock pin to reenter the locking recess. But as this manipulation isnotl always entirely convenient it becomes desirable to accomplish itmechanically or automatically by the movement of a single lever forexample. Also, it will be evident that the considerably projecting jawsare somewhat dangerous, the momentum being considerable, and theirradial projection rather i exposed. In order to provide for thesefeatures a few more or less diagrammatic gures of the drawings arefurnished, showing a simple construction for accomplishing the result.It will be observed that the draw tube is here operated by a fluidpressure cylinder 60 concentrically mounted on the lathe spindle 2. Theiiuid pressure is then made to propel the draw tube 3 in a direction toclamp the work. TWhen the fluid pressure is released the draw tube ismoved in the opposite direction by a plurality of springs 6l arrangedabout the draw tube. The controlling rod 29 has a disk or disks G2 linedthereto adapted to receive the thrust of a nonrotatable disk or disks 63controlled by a lever 64, the disks 62 being thereby forced.

against a xed disk or disks G5. ln this way the motion of the lever 64thr sts the controlling rod 29 in one direction or the other, andat thesaine time applies a braking influence on account of the engagements ofthe disks 52, 63 and 65. This accomplishes the movements alreadydescribed automatically, that is to say by the mere to and ','fromovement by the controllingl lever G41-,

A further brake sleeve 66 is illustrated surrounding the chuck casingand having a pro- -jecting portion which affords a guard around therapidly flying jaws. This brake is conveniently applied by the pull of arodv 67 attached to lever extension 68 attached to link 68, thelink-joint 69 being attached or connected to the belt shipper lo.

, way the movement of the belt shipper in either direction to start thespindle in either direct or reverse rotation, according to the usualpractice, results in releasing the pull In this The whole operation istherefore as follows The operator takes a piece of work, forexample arough casting, and places it more or less roughly in position betweenthe two chuck jaws. The fluid pressure is then turned on, causing thcjaws to come together with force, and clainp the casting in a fixedposition with respect to the swivel heads, which relative positioncontinues throughout the entire further work on the article. The beltshipper is then pushed to start the spindle in rotation, simultaneouslyreleasing the brake as just described, and the usual turret (not shown)is made to accomplish as many operations on a single axis of the work asmay be required, whereupon the lever G4 -is pushed over and back, (butwithout the operator simultaneously having the trouble of manipulatitngthe belt shipper) which accomplishes the changing of the position of thework to a new axis in the chuck. The turret moving and jaw swiveling asdescribed, are repeated as many times as necessary, whereupon the beltshipper is thrown to apply the brake, stop the rotation of the spindle,and the air pressure released so as to permit the removal of thefinished piece. In view of the fact that the manipulation necessary forthese purposes is of a very simple character, capable of being done byany one, it is not necessary to make the machine yany further automatic,for example, by providing cams for working the proper levers in theproper sequence, as is done with automatic screw machines. It will,however, be seen that the machine is substantially automatic for thepurposes of manufacturing certain more or less complicated articlescompl'te, from start to finish in one operation, and requiring only thecomparatively unskilled superintendence of an operator to put in therough castings and take out the finished Work, with the incidentaloperation of the described controlling means. Also it will be observedthat there is no loss of time, resulting in an unnecessary cost. The manufacture of the articles is accomplished as rapidly as possible.

What claimed is :M-

l. The combination of jaws, displaceable heads in said jaws, means forclamping the jaws on a piece of work, a spindle, and means extendingthrough the spindle for changing the position of said heads in the jawswhile the latter are clamped upon the Work. f y

2. The combination of jaws, swiveled heads in said jaws, means forclamping the jaws -on a. piece of work, a spindle., and

means extending through the spindle -for swiveling said heads in saidjaws while the 3 latter are clamped upon the work.

The combination of jaws, swiveled heads in said jaws, means for clampingthe jaws on a piece of work, a spindle, means extending through thespindle for swiveling said heads in said jaws while the latter areclamped upon the work, and means 'for locking and unlocking said headsin said jaws.

4. 'lhe combination oi jaws, swiveled heads in said jaws, means forclamping the jaws on a piece of work, a spindle, means coaxial with thespindle 'for swiveling said heads in said jaws while the latter areclamped upon the work, and means extending through the spindle forlocking and unllocking said heads in said jaws.

5. The combination of jaws, displaceable heads in said jaws,` means forclamping the jaws upon a piece of work, a spindle, and means extendingthrough the spindle for displacing said heads in the jaws while thelatter are clamped upon the work.

6. IThe combination of jaws, displacaible heads in said jaws, means forclamping the jaws upon a piece of work, a spindle, a gear i coaxial withthe spindle for displacing said heads in the jaws while the latter areclamped upon the work, and means for locking and unlocking the heads insaid jaws.

7. The combination of jaws, displaceable heads in said jaws, means forclamping the jaws upon a piece of work, a spindle, a gear coaxial withthe spindle for displacing said heads in the jaws while the latter areclamped upon the work, and means extend- 4o ing through the spindle forlocking and unlocking the heads in said jaws.

8. The combination of jaws, swiveled heads in said jaws, means forclamping'the jaws on a piece of work, a spindle, and

means extending through the spindle for looking and unlocking said headsin the jaws and for swiveling the heads from one position to another.

9. The combination of jaws, a spindle,

swiveled heads in said jaws, means carried by the spindle for clampingthe jaws on a piece of work, and means extending through the spindle forlocking and unlocking said heads in the jaws and for swiveling the headsfrom one position to another, while the chuck is continuing its normalmovement of rotation.

10. 'llhe combination of jaws, swivel heads lin said jaws, a lathespindle, means carried by the` spindle for forcing said jaws toward oneanother, a worm gear forming part of: one of the swivel heads, aplurality of gears intermeshing with Q eanother and driving said wormgear, a 1d ieans Vcoaxial with the lspindle for causingjsaid gearsnto.planetate Laatse@ and swivel said heads without stopping the rotationof the spindle.

l1. The combination oil jaws, Aswivel heads in said jaws, a lathespindle, a train of gears in one. of said jaws for turning one of the 7iswivel heads on its axis, and a rod having a gear extending through.said spindle, whereby said gears may be made to planetate and rotatesaid swivel heads.

l2. The combination oi' jaws, swivel heads *"5 in said aws, a lathespindle, a train of gears having rigid axles in one of said jaws forturning one of the swivel heads on its axis, and a rod having a gearextending through said spindle, whereby said gears may be made toplanetate and rotate said swivel heads. v,

13. The combination of jaws, swivel heads l in said jaws, a lathespindle, means carried by the spindle for forcing said jaws toward 'Ione another, a ball thrust for the respective heads, a train et' gearsin one of the jaws for rotating said heads.

14C. rlhe combination of jaws, .swivel heads in said jaws, a lathespindle, means carried by the spindle for forcing said jaws toward oneanother, a ball thrust for the respective heads, a train of gears in oneof the jaws ior rotating said heads, and a lock pin.

l5. The combination of jaws, swivel heads i5 in said jaws, a central oraxial rod having a gear, a train of gears meshing therewith for rotatingone of said heads, and means actuated by longitudinally moving said rodfor locking` and unlocking one of the heads. l0

1G. The combination or' jaws, .swivel heads in said jaws, a lathespindle, means carried by the spindle for forcing said jaws toward oneanother, a central or axial rod having a gear, a train of gears meshingtherewith for M5 rotating one of said heads, and means actuated bylongitudinally moving said rod for locking and unlocking one of theheads.

1.7. rlhe con'ibination or jaws, swivel h eads in said jaws, a lathespindle, a draw tube exil@ tending through the spindle, inclined waysfor forcing said jaws toward one another, a rod extendingV through saiddraw tube, and meansactuated by said red for rotating said headsin the jaws: j

18. rihe combination of jaws, swivel heads in said jaws, a lathespindle, a d aw tube extending through the spindle, inclined ways forforcing said jaws toward one another, a rod extending through said rawtube, and 12e means actuated by said rod for locking and unlocking theheads in 'the jaws.

19. rllhe combination of jaws, swivel heads in said jaws, a lathespindle, a draw tube extending through the spindle, inclined ways i255for forcing said jaws toward one another, a rod extending through saiddraw tube, and nieans actuated by. said rod for locking and l,ugnlockingthe heads in the jaws, and rotating the heads in the jaws.l

assises 20. The combination of jaws, swivel heads in said jaws, a rodfor rotating said heads when the rod is held stationary and locking andunlocking said heads when the rod is moved longitudinally.

21. The combination of jaws, swivel heads in said jaws, a lathe spindle,means carried by the spindle for forcing said jaws toward one another, arod extending through the spindle for rotating said heads when the rodis held stationary and locking and unlocking said heads when the rod ismoved longitudinallv.

22. rl`he combination of jaws, swivel heads in said jaws, a lathespindle, a rod extending through said spindle having;r a gear, means forrotating the heads in the jaws when said gear is held stationary. andlevers in one of said jaws for locking and unlocking the head thereof.one of said levers extending into the path ot' longitudinal movementofsaid rod.

23. The combination of jaws, swivel heads in said jaws, a lathe spindle.means Carried b v the spindle tor forcing said jaws toward one another,a rod extending through said spindle having a gear, means for rotatingthe heads in the jaws when said gear is held stationary and levers inone of said'jaws for locking and unlocking the head thereof, one ot'said levers extending into the path of longitudinal movement of saidrod.

24. The combination of jaws, swivel heads in said jaws, a lathe spindle,a chuck casing, extensions fixed to the respective jaws, and slidable inthe chuck casing, each jaw lapping past the extension of the other jaw.

25. The combination ofjaws, swivel heads in said jaws, one of the headshaving a flange formed in its inner face, with recesses 37 withdepressed shelf3.l3 and an inclined portion 37, means for turning` saidhead in the jaw, and a lock pin movable in the direction of the axis ofthe head to enter said recesses.

26. The combination of jaws, swivel heads in said jaws, one of the headshaving a tiange with recesses, a lock pin guided in'said jaw, a bellcrank lever engaging said lock pin, and a rock lever extended to theaxis of the chuck and engaging said bell crank lever.

2?. The combination of jaws, swivel heads in said jaws, one head havinga worm gear thereon, a worm having a shaft extending through said jaw, atrain of gears drivingl said worm shaft, and a rod havingn a gearextending into the center of the chuck.

28. The combination` oit' jaws, swivel heads in said jaws, one headhaving a worm gear thereon, a worm-having, a shaft extending throughsaid jaw, a train of gears driving said worm shaft, and a lock pinadapted to be displaced in said j aw forlocking and unlocking said head.

29. The combination of jaws, swivel heads` in Said jaws, a lathespindle, means carried' erating with portions or" said rod, and meansfor operating said disks to control the movements ofsaid rod. I

31. The combination oi jaws. swivel heads in said jaws, a draw tube forforcingsaid jaws toward one another. a rod extending through the drawtube for rotating the heads in the jaws and locking; and unlocking thesame, said rod having a plnralitv of disks or collars thereon,non-rotatable disks coperating; to displace the rod longitudinali)7 andapply braking forces thereon, and means for controlling the latterdisks.

82. The combination of jaws, swivel heads in said jaws, a lathe spindle.devices carried b v the spindle for forcingsaid jaws toward one another,means for rotating said heads in the jaws and locking and unlocking 'thesame, and ay lever having Ia connection for moving said meanslongitudinally and for applying a braking force thereto.

33. The combination of jaws. swivel heads tending through the draw tubefor rotating said heads in the jaws and locking and unn locking,n thesame.y means having a to and fro movement for displacing' said rodlongitudinalluv, and means acting on the rod when'it is movedlongitudinally for applying a braking force thereto.

311-. T he combination oi: jaws, swivel heads in said jaws., a lathespindle. a draw tube, fluid pressure means for operating said dra-wtube, a rod extending through said draw tube and capable of having alongitudinal. and rotary movement with respect to the spindle, means forrotating said heads in the jaws, and locking and unlocking the sameunder the respective movements of the rod, and oisans for having a toand tro movement in `giving such movements to rod.

35. The combination of jaws, a lathe spindle, an air cylinder on thespindle substantialljT adjacent to said jaws and operating the same, andmeans extending through the spindle for swiveling said jaws.

36,b The combination of jaws, swivel heads in sajd jaws, a lathespindle, an air cylinder substantially adjacent to said jaws foroperating the saine, and means extending through lili? isa the spindlefor causing the rotation of said heads in said jaws. A

37. The combination of jaws, swivel heads in said jaws, a lathe spindle,an air `cylinder substantially adjacent to said jaws for operating thcsame, and means extending through the spindle for causing the rotationof said headsin said jaws, and for locking and unlocking said heads inthe jaws.

38. The combination of chuck jaws, swivel heads in Said jaws, and meansoperated by the rotation of the chuck itself for swiveling said heads insaid jaws.

39. The combination of chuck jaws, swivel 15 heads in said jaws, meansoperated by the rotation of the chuck itself for swiveling said heads insaid jaws, and means for locking and unlocking the heads in said jaws.

40. The combination of chuck aws, swivel heads in said jaws, a brake,and means operated by the conjoint action of said brake and mmes therotation of the chuck itself for swiveling said heads in said jaws.

4l. The combination of a chuck casing jaws extending clear across thediameter o the chuck casing, swiveling heads in said jaws, and a lateralextension of each jaw bearing on the guides of the other jaw.

42. rl`he combination of a chuck casing jaws extending clear across thediameter ot the chuck Casing, a lateral extension of each jaw bearing onthe guides of the Vother jaw, swiveling heads in each jaw, and a gearc0- axial with the chuck for rotating said swivel heads in said jaws.

Signed at New York, in the county of New York and State of New York,this 28th day of July, A. D., 1914.

RDV/ARD J. MCCLELLAN. `Witnesses:

CnAs. T. LUTHER, T. A. POWER.

